SWITZERLAND JOTA

jota kit 1724

All Ceramic Prep by Dr. Milko Villarroel

on the spot

Ceramic Prep all in one for Laminates and Crowns

PhD in Restorative Dentistry, São Paulo State University FOAr – Brazil.Master Dental Science, Integrated Clinic at State University of Punta Grosa – Brazil.Scientifi c Director, CWB Dental Training Curitiba, Brazil Licensed in Dental Science, University of Valparaíso.

Photo byPhoto byDr Milko VillarroelDr Milko Villarroel

Using the kit

Quality instruments for precision work

Maximising simplicity through the use of a procedure

In the search for conservative treatments, various restorative alternatives have been proposed. Dental preparation is a critically

important phase in which several parameters must be kept in mind to reach a predictable and satisfactory fi nal result. Currently,

the use of wax-ups and mock-ups enable visualisation of the amount of the dental structure that must be removed, or if this

must be minimised to have adequate space.

The balance between minimal tooth reduction and the space needed for restoration must be based in a preliminary test of the

fi nal volume for the envisioned restoration. This procedure is highly relevant, since the preservation of the dental structure

(enamel and dentin) will be refl ected in the biomechanical behaviour of the tooth. Thus, the dental preparation phase should

be based on rational and sound procedures, and should not be improvised.

The kit has a detailed sequence of instruments, corresponding to each of the steps in the procedure for preparing crowns and ceramic laminates, as described below.

Step 1

jota kit 1724

All Ceramic Prep by Dr. Milko Villarroel

on the spot

The spherical bur is used to determine the specifi c depth for each region (vestibular). For the laminate procedure, it is recommended to use a small diameter spherical bur (801.FG.012) in the cervical region and a large diameter bur (801.FG.016) in the medial and incisal regions.

Step 1 – Determining the depth

Sequence for laminates

> Determining the depth of wear using a mock-up. Using half of the spherical bur, with the

stem of the bur serving as a stop. The 801.FG.012 bur for the cervical region and 801.FG.016

for the medial and incisal region.

> Removal of the mock-up and joining the grooves with abrasion burs (blue ring).

It is suggested to use the 850.FG.014 bur for the laterals, the 850.FG.016 for the centrals

and the 850.FG.018 for the canines.

> Incisal reduction, this step will determine the clinical need for the case.

> Placement of the retractor wire.

> Cervical demarcation.

> Finishing and polishing the dental surface. Use of the fi nishing burs (red ring).

801.FG.012 850.FG.016

850.FG.016 850.FG.016850.FG.016

Step 2 – Superfi cial abrasion

Intended for vestibular abrasion, through joining the orientation grooves and creating the necessary space for defi nitive restoration. (It is suggested to use the 850.FG.014 bur for the laterals, the 850.FG.016 for the centrals and the 850.FG.018 for the canines).

jota kit 1724

All Ceramic Prep by Dr. Milko VillarroelPreparation for ceramic laminates

Step 3 – Finishing and polishing

This phase is intended to leave smooth, regular surfaces. For this, the same approach is used to prevent any alteration of the depth of the preparation.

Step 4 – Specialty burs

The goal of cervical fi nishing is better conservation of the cervical enamel and both fi nishing procedures are intended to leave a visible demarcation with minimal abrasion.

• 801F.FG.010 enables the creation of a cervical boundary

• 858F.FG.010 enables working with a knife edge

849F.FG.025 fi nishing and polishing pre-existing preparations in the posterior teeth. 858F.FG.010 elimination of contact points between the anterior teeth.

801F.FG.010 801F.FG.010

Final result

850F.FG.016

Finished and polished preparation.

on the spot

Sequence for crowns

> Determination of the abrasion depth with the 850.FG.014 bur using a mock-up to create the orientation grooves.

Remember that usually 3 dental surface planes are present, which must be kept in mind.

> Removal of the mock-up and junction of the orientation grooves.

> Elimination of the proximal contacts using the 858F.FG.010 bur.

> Incisal reduction

> Palatal abrasion using the fl ame-shaped 830.FG.023 bur.

> Gingival retraction and cervical demarcation

> Finishing and polishing of the preparation with a fi ne-grained bur (red ring).

Step 1 – Determination of the abrasion depth

Determination of the abrasion depth with an 850.FG.014 bur, using a mock-up to create the orientation grooves. Remember that usually 3 dental surface planes are present, which must be kept in mind.

Step 2 – Removal of the mock-up and junction of the orientation grooves

850.FG.016

850.FG.014

850.FG.016

Clinical step with the objective of joining the orientation grooves created in Step 1, aimed at creating the space necessary for restoration.

jota kit 1724

All Ceramic Prep by Dr. Milko VillarroelProcedure for preparing a crown

850.FG.016

Step 3 – Elimination of the proximal contacts

With the 858F.FG.010 bur

850.016850.016

Step 4 – Incisal reduction

With the objective of creating vertical space.

Step 5 – Palatal abrasion

With the 830.FG.023 fl ame-shaped bur.

830.FG.023 830.FG.023

858F.FG.010

850.FG.016

on the spot

Step 6 – Gingival reduction and cervical demarcation

Gingival protection is achieved using a retractor wire. The cervical demarcation will allow adequate space while avoiding over-contouring.

Step 7 – Refi nement at the gingival level

The goal of the fi nal stage of refi nement is to leave fl at surfaces free of roughness. Here, the instruments with a red ring (fi ne) are ideal for this purpose, since the size of the diamond particles is between 27 and 76 micrometers.

850F.FG.016

850.FG.016

850F.FG.016

850F.FG.016

on the spot

JOTA-Dealer

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SWITZERLAND JOTA

jota kit 1724

All Ceramic Prep by Dr. Milko Villarroel

JOTA AG Rotary InstrumentsHirschensprungstrasse 2, 9464 Rüthi, SwitzerlandPhone +41 (0)71 767 79 99, Fax +41 (0)71 767 79 97info@jota.ch, www.jota.ch SWITZERLAND

0483

850.FG.014

250’000 rpm

852.FG.018 830F.FG.023

801.FG.016

300’000 rpm

850.FG.016

300’000 rpm

850F.FG.014

801.FG.012

801F.FG.010

852F.FG.018

830.FG.023

858F.FG.010

849F.FG.025

190’000 rpm

850F.FG.016

280’000 rpm 250’000 rpm

280’000 rpm

280’000 rpm 300’000 rpm

300’000 rpm

190’000 rpm 300’000 rpm

180’000 rpm